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December 13th, 2025 :: 11:16 pm CST   

Local Weather Report for
Decatur
Illinois, United States

 Current Decatur Weather Conditions Updated December 13th at 9:54 pm 
light snow
Temperature:3°F Dew Point:-0°F
Barometer:30.42 inHg Wind:N 24 Mph
Humidity:80.3% Visibility:0M
 
 Decatur Weather Forecast Summary  
 
Today
Dec 13th
Sunday
Dec 14th
Monday
Dec 15th
Tuesday
Dec 16th
Wednesday
Dec 17th
Flurries Sunny Cloudy Cloudy Cloudy
23°F
5°F
-8°F
26°F
-2°F
37°F
18°F
45°F
35°F
 
 Decatur Detailed Weather Forecast  
 
Sunday, December 14th, 2025
Overnight Temperature: -6°F
Clear. Windy at times.
Morning Temperature: 0°F
Sunny.
Afternoon Temperature: -6°F
Sunny.
Evening Temperature: -7°F
Clear.
Monday, December 15th, 2025
Overnight Temperature: 1°F
Cloudy. Windy at times.
Morning Temperature: 19°F
Cloudy. Windy at times.
Afternoon Temperature: 23°F
Cloudy.
Evening Temperature: 18°F
Cloudy.
Tuesday, December 16th, 2025
Overnight Temperature: 18°F
A mix of clear and cloudy skies.
Morning Temperature: 31°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 37°F
Sunny. Windy at times.
Evening Temperature: 36°F
Cloudy. Windy at times.
Wednesday, December 17th, 2025
Overnight Temperature: 36°F
Cloudy. Windy at times.
Morning Temperature: 36°F
Cloudy.
Afternoon Temperature: 39°F
Cloudy.
Evening Temperature: 43°F
Cloudy with a slight chance of showers. Windy.
Thursday, December 18th, 2025
Overnight Temperature: 52°F
Cloudy with a chance of showers. Windy.
Morning Temperature: 52°F
Cloudy with showers likely. Windy.
Afternoon Temperature: 44°F
Cloudy. Windy at times.
Evening Temperature: 44°F
Cloudy. Windy.
Friday, December 19th, 2025
Overnight Temperature: 37°F
Cloudy. Windy at times.
Morning Temperature: 38°F
Cloudy. Windy at times.
Afternoon Temperature: 40°F
Cloudy. Windy at times.
Evening Temperature: 44°F
Cloudy. Windy.
Saturday, December 20th, 2025
Overnight Temperature: 50°F
Cloudy with a slight chance of showers. Windy.
Morning Temperature: 61°F
Cloudy with a chance of showers. Windy.
Afternoon Temperature: 47°F
Cloudy with showers likely. Windy.
Evening Temperature: 40°F
Cloudy. Windy.
Sunday, December 21st, 2025
Overnight Temperature: 30°F
Cloudy. Windy at times.
Morning Temperature: 32°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 30°F
Sunny.
Evening Temperature: 28°F
Clear.





 

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9:55 PM  5°F
 
 
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9:53 PM  -2°F
 
 
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9:55 PM  3°F
 
 
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9:53 PM  -2°F
 

 
This WeatherCity Weather Forecast for Decatur, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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